流体机械

2020, v.48;No.575(05) 72-75+81

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变频高温压缩机复叠热泵系统的试验研究
Experimental Study on Cascade Heat Pump System for Variable-frequency High-temperature Compressor

杨永安;李瑞申;孙天慧;朱轶群;
Yang Yongan;Li Ruishen;Sun Tianhui;Zhu Yiqun;College of Mechanical Engineering,Tianjin University of Commerce;Huashang International Engineering Co.,Ltd.;

摘要(Abstract):

为了研究压缩机频率对复叠式热泵系统的影响,结合复叠式循环技术与压缩机变频技术,搭建变高温压缩机频率复叠热泵实验台。研究分析了压缩机排气温度、压缩机功率、系统制热量及系统COP(以下COP均指系统COP)随高温压缩机频率的变化,试验结果表明:当蒸发温度-30 ℃,冷凝温度46 ℃工况下,随高温压缩机频率增加,高温压缩机排气温度上升,上升速度逐渐加快,最高排气温度99.7 ℃,小于120 ℃,低温压缩机排气温度下降,下降速度逐渐缓慢;高温压缩机功率逐渐增大,低温压缩机功率逐渐减小,系统功率呈增加趋势;系统制热量呈线性增加趋势,COP随高温压缩机频率增加呈先增加后减小趋势,最大COP为2.7。
In order to study the influence of compressor frequency on the cascade heat pump system,a cascade heat pump experiment platform with frequency conversion technology of high temperature compressor was built in combination with cascade circulation technology and compressor frequency conversion technology.The variation of compressor exhaust temperature,compressor power,system heating capacity and COP(the following COPs all refer to system COP) with high temperature compressor frequency was studied and analyzed.The experiments show that,when the evaporation temperature is-30 ℃ and the condensation temperature is 46 ℃,with the increase of high temperature compressor frequency,The exhaust temperature of high-temperature compressor increases,and the increasing speed becomes faster,the maximum exhaust temperature is 99.7 ℃,which is less than 120 ℃.The exhaust temperature of the low-temperature compressor decreases,and the decreasing speed is slowing down;High-temperature compressor power increases gradually,low-temperature compressor power decreases gradually,and the system power increases;System heating increases linearly,with the increase of high temperature compressor frequency,COP increases first and then decreases,and the maximum value is 2.7.

关键词(KeyWords): 频率;复叠;热泵;COP
frequency;cascade;heat pump;COP

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作者(Author): 杨永安;李瑞申;孙天慧;朱轶群;
Yang Yongan;Li Ruishen;Sun Tianhui;Zhu Yiqun;College of Mechanical Engineering,Tianjin University of Commerce;Huashang International Engineering Co.,Ltd.;

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